2014-02-19 9:40 GMT+01:00 Schlacta, Christ :
> In just the last week I've seen at least two failures as a result of
> replication factor two. I would highly suggest that for any critical data
> you choose an rf of at least three.
>
Could you explain me why failures happened?
> With your stated ca
2014-02-19 9:31 GMT+01:00 Robert Sander :
>
> Drop RAID5 and create one OSD per harddisk.
>
I was thinking about using RAID5 to keep the disk redundancy even during
the file sync process through the nodes.
What do you think about this?
> If you need to store small files consider how your applica
Hi.
I have to create a new Ceph cluster with 3 nodes with 4 hard drives in
RAID5 (12Tb available per node).
I will need 18Tb of available space, so I will create two OSDs per node
with a replication factor of 2, and my data will be safe if a node will
fail, right?
Can you advise me a good configu
Thank you Juan for all info!
So, if I understand well, just create three nodes, one OSD per hard drive
(without having RAID) and that's all?
Will Ceph be able to choose itself where to store data?
Let's try!
Thank you very much,
bye!
2013/12/23 JuanJose Galvez
> On 12/22/2013 1:
>
> Replication is set on a per pool basis. You can set some, or all, pools to
> replica size of 2 instead of 3.
>
Thank you very much. I saw this is to be setted in the global configuration
(osd pool default size).
So it's up to me to configure Ceph to be rendundant and fault tolerant?
If I set "
>
> I all depends on the replication level you use, but let's assume 3.
>
Does replication level 3 mean that the data are all replicated three times
in the cluster?
So you get the capacity of one machine.
>
> 4 * 1000 * 1000 / 1024 /1024 = 3.81TB
>
> This would result in 15.24TB of raw space per
Hi.
I am trying to understand how much space available I will get on my Ceph
cluster if I will use three servers with 4x4Tb hard drives each.
Thank you very much!
Bye.
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what Ceph provides.
>
> My 2cts ;-)
>
> On 02/10/2013 13:50, shacky wrote:
> > Hi.
> >
> > I am going to create my first Ceph cluster using 3 physical servers and
> Ubuntu distribution.
> > Each server will have three 3Tb hard drives, connected with or without a
Hi.
I am going to create my first Ceph cluster using 3 physical servers and
Ubuntu distribution.
Each server will have three 3Tb hard drives, connected with or without a
physycal RAID controller.
I would have to be protect on a fault of one of this three servers, having
as much as space possible,
